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| Mirrors > Home > MPE Home > Th. List > vsnid | Structured version Visualization version GIF version | ||
| Description: A setvar variable is a member of its singleton. (Contributed by David A. Wheeler, 8-Dec-2018.) |
| Ref | Expression |
|---|---|
| vsnid | ⊢ 𝑥 ∈ {𝑥} |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | vex 3454 | . 2 ⊢ 𝑥 ∈ V | |
| 2 | 1 | snid 4622 | 1 ⊢ 𝑥 ∈ {𝑥} |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: ∈ wcel 2144 {csn 4583 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1827 ax-4 1841 ax-5 1942 ax-6 1999 ax-7 2040 ax-8 2146 ax-9 2154 ax-ext 2732 |
| This proof depends on definitions: df-bi 210 df-an 402 df-tru 1572 df-ex 1812 df-sb 2099 df-clab 2739 df-cleq 2752 df-clel 2835 df-v 3452 df-sn 4584 |
| This theorem is used by: exsnrex 4640 rext 5415 unipw 5417 xpdifid 6158 xpdifcnvepel 6159 opabiota 6967 fnressn 7162 fressnfv 7164 snnex 7772 frrlem12 8315 frrlem14 8317 mapsnd 8914 funen1cnv 9056 findcard2d 9182 ac6sfi 9275 iunfi 9332 elirrvOLDOLD 9593 kmlem2 10230 fin1a2lem10 10487 hsmexlem4 10507 iunfo 10623 modfsummodslem1 15959 lcmfunsnlem2lem1 16813 coprmprod 16836 coprmproddvdslem 16837 c0snmgmhm 20692 lbsextlem4 21439 frlmlbs 22103 coe1fzgsumdlem 22621 evl1gsumdlem 22674 maducoeval2 22955 dishaus 23700 dis2ndc 23779 dislly 23816 dissnlocfin 23848 comppfsc 23851 txdis 23951 txdis1cn 23954 txkgen 23971 isufil2 24227 alexsubALTlem4 24369 tmdgsum 24414 dscopn 24892 ovolfiniun 25822 volfiniun 25868 jensen 27316 uvtx01vtx 29978 cplgr1vlem 30010 unidifsnel 33131 gsumpart 33624 dflring3 34029 mplidomlem 34159 vieta 34212 extdg1id 34298 irngss 34319 esum2dlem 34724 bnj1498 35691 fineqvnttrclselem2 35790 wevgblacfn 35890 cvmlift2lem1 36067 funpartlem 36706 ttcid 37280 topdifinffinlem 38271 fvineqsneq 38336 pibt2 38341 finixpnum 38529 mbfresfi 38585 pclfinN 40958 sn-iotalem 43276 mzpcompact2lem 43762 dvmptfprod 46955 fourierdlem48 47164 sge0sup 47401 funressnvmo 48115 dfclnbgr6 48954 dfsclnbgr6 48956 termco 50589 termcarweu 50636 diag1f1o 50642 diag2f1o 50645 |
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